/*
* @(#)NumberTextFigure.java
*
* Project: JHotdraw - a GUI framework for technical drawings
* http://www.jhotdraw.org
* http://jhotdraw.sourceforge.net
* Copyright: � by the original author(s) and all contributors
* License: Lesser GNU Public License (LGPL)
* http://www.opensource.org/licenses/lgpl-license.html
*/
package org.jhotdraw.figures;
import org.jhotdraw.framework.Figure;
/**
* A TextFigure specialized to edit numbers.
*
* @version <$CURRENT_VERSION$>
*/
public class NumberTextFigure extends TextFigure {
/*
* Serialization support.
*/
private static final long serialVersionUID = -4056859232918336475L;
private int numberTextFigureSerializedDataVersion = 1;
/**
* Gets the number of columns to be used by the text overlay.
* @see org.jhotdraw.util.FloatingTextField
*/
public int overlayColumns() {
return Math.max(4, getText().length());
}
/**
* Gets the numerical value of the contained text.
* return the value or 0 in the case of an illegal number format.
*/
public int getValue() {
int value = 0;
try {
value = Integer.parseInt(getText());
}
catch (NumberFormatException e) {
value = 0;
}
return value;
}
/**
* Sets the numberical value of the contained text.
*/
public void setValue(int value) {
setText(Integer.toString(value));
}
/**
* Usually, a TextHolders is implemented by a Figure subclass. To avoid casting
* a TextHolder to a Figure this method can be used for polymorphism (in this
* case, let the (same) object appear to be of another type).
* Note, that the figure returned is not the figure to which the TextHolder is
* (and its representing figure) connected.
* @return figure responsible for representing the content of this TextHolder
*/
public Figure getRepresentingFigure() {
return this;
}
}